23213431220 has 24 divisors (see below), whose sum is σ = 55712235264. Its totient is φ = 7958890656.

The previous prime is 23213431217. The next prime is 23213431273. The reversal of 23213431220 is 2213431232.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82904972 + ... + 82905251.

It is an arithmetic number, because the mean of its divisors is an integer number (2321343136).

Almost surely, 2^23213431220 is an apocalyptic number.

23213431220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23213431220 is an abundant number, since it is smaller than the sum of its proper divisors (32498804044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23213431220 is a wasteful number, since it uses less digits than its factorization.

23213431220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165810239 (or 165810237 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 23213431220 its reverse (2213431232), we get a palindrome (25426862452).

The spelling of 23213431220 in words is "twenty-three billion, two hundred thirteen million, four hundred thirty-one thousand, two hundred twenty".